It is Northern Ireland that provides the classic contemporary demonstration of Clausewitzian principles in action. In 1974 the Ulster Protestants rej… - Correlli Barnett

Britain in particular was again paying the penalty for a hundred years of Free Trade policy. This had rendered her dependent on enormous quantities of imported foodstuffs (to the ruin of British agriculture, only now being once more resuscitated in wartime by emergency measures). Free Trade had also reduced her general economic and industrial self-sufficiency by exposing her home market to massive imports of foreign technology, all of it paid for in peacetime by British exports (now reduced to only a third of the peacetime figure) or by income from foreign investments (now all liquidated). In the Victorian era this national dependence on a high volume of seaborne imports and exports had seemed the formula for unexampled prosperity. Now, in the crisis of a world war, it constituted, as in 1914–18, a strategic vulnerability that menaced the country's very survival.

[A]s Britain's wartime record demonstrates and the contemporaneous surveys of postwar export prospects grimly concluded, here was no industrial equivalent of a panzer striking force, superbly equipped with the best of modern technology, its troops brought to a high pitch of morale and tactical training, and blessed with dynamic leadership from the high command down to junior officers and NCOs. Rather, Britain as an industrial society in 1945 more resembled the French Army of 1940 – its equipment (including infrastructure such as ports, roads and railways) largely old and outmoded; its tactical doctrines out of date; the standard of training of its regimental officers (in other words, line and shop-floor managers) often lamentable; its NCO corps (trade union conveners and shop-stewards) more devoted to thwarting the officers than obeying them; the morale and motivation of its ill-educated rank and file low, even to the point of recurrent local mutiny; and its generals (boards and top management) largely too timid, too torpid, too set in the ways of the past to measure up to the exacting role of planning and conducting a war of conquest for world markets.

For full employment also execrated a by-product highly poisonous to the health of the nation's economy as a whole: the so-called "wage-price" spiral of inflation. This weakened the cost-competitiveness of British exports, so in turn menacing the balance of payments, the international standing of the pound, the survival of the Sterling Area, and ultimately the grandiose but wobbly facade of Britain as a world power. Moreover, even full employment's comforting warm milk of abundant pay-packets and easy profits only served to render the British economy at home fat and flabby, so that even dud companies (especially in older technologies) found it easy to keep bumbling along.